86% of flights from San Jose to Portland arrived on time over the past 12 months. That is better than the typical U.S. route. The 6 a.m. departures ran on time 97% of the time; the noon ones 75%. Most reliable airline: Alaska Airlines (89%). 5% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SJC → PDX: when a flight was late, it was under 45 minutes late 59% of the time. About 1 in 26 flights landed an hour or more late, and 1 in 213 three hours or more; 0.6% were cancelled outright.
- On time or early86%
- 15–30 min late5.2%
- 30–60 min late4.3%
- 1–2 hours late2.7%
- 2–3 hours late0.7%
- 3+ hours late0.5%
- Diverted0.1%
- Cancelled0.6%
Share of all 2,554 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Alaska Airlines | 1,631 | 89% | 0.9% | −12 min | 3.4% | +65 min | Horizon Air 53%, SkyWest 29%, Alaska Airlines 18% |
| Southwest Airlines | 923 | 80% | 0.0% | −6 min | 4.7% | +49 min | Southwest Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at SJC). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Alaska Airlines | Southwest Airlines |
|---|---|---|
| 6 a.m. | — | 97% |
| 7 a.m. | 95% | — |
| 8 a.m. | 99% | — |
| 9 a.m. | 93% | — |
| 11 a.m. | 93% | — |
| 2 p.m. | 91% | — |
| 6 p.m. | 76% | — |
| 8 p.m. | — | 80% |
Last flight of the day
On SJC → PDX, each airline's last flight of the day was cancelled 0.1% of the time, against 0.8% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 0.6% of the time (earlier flights: 0.4%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Alaska Airlines | 6:37 p.m. | 0.3% | 0.8% | 1.1% | first flight 8:00 a.m. |
| Southwest Airlines | 8:05 p.m. | 0.0% | 0.3% | 0.0% | first flight 6:55 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: April (90%). Worst: July (83%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 405 | 86% | 0.7% |
| Tuesday | 347 | 90% | 0.3% |
| Wednesday | 344 | 90% | 0.9% |
| Thursday | 393 | 87% | 0.3% |
| Friday | 394 | 80% | 1.3% |
| Saturday | 289 | 87% | 0.7% |
| Sunday | 382 | 83% | 0.0% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: airline 11 · air traffic/airport 4
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| AS 2274 | 9:30 a.m. | 140 | 93% | 1.4% | −11 min | Horizon Air |
| AS 2240 | 2:46 p.m. | 232 | 83% | 0.0% | −11 min | Horizon Air |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jun 27, 2026 | 7 | 43% | 0 |
| Oct 10, 2025 | 9 | 44% | 0 |
| Aug 24, 2026 | 8 | 50% | 0 |
| Jul 10, 2026 | 8 | 50% | 0 |
| Jun 22, 2026 | 8 | 50% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of San Jose or Portland. None has been clearly more reliable than SJC → PDX.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| SJC → PDX (this route) | 2,554 | 86% | 0.6% |
| OAK → PDX Oakland to Portland | 1,913 | 82% | 0.8% |
| SFO → PDX San Francisco to Portland | 3,729 | 76% | 0.7% |
Questions
How often are flights from SJC to PDX on time?
86% of 2,554 scheduled flights from San Jose, CA to Portland, OR arrived within 15 minutes of schedule between September 2025 and August 2026. 0.6% were cancelled.
What is the best time of day to fly SJC to PDX?
Flights scheduled to leave at 6 a.m. were the most reliable (97% on time). The noon departures were the least (75%).
Which airline is most on time from SJC to PDX?
Alaska Airlines: 89% of its 1,631 flights on the route arrived on time. Southwest Airlines: 80%.
What month has the most delays from SJC to PDX?
July (83% on time). The best month is April (90%), over 2023–2026.
Is the last flight of the day from SJC to PDX more likely to be cancelled?
No, the opposite. Each airline's last SJC–PDX flight of the day was cancelled 0.1% of the time over the past year, against 0.8% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- PDX → SJC (return)
- San Jose (SJC) delays by hour
- Flights into Portland (PDX)
- Alaska Airlines on-time record
- Southwest Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.